grow up to be为什么要加be,weigh up to就不要加be

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/12 00:21:05

同学,很高兴回答你的问题
grow up to be 意思是：长成...的意思,grow up长大,成长
而weigh up to 后面接表示重量的数词,因为weigh up意思是重量达到...,如
This bag weighs up to 10 kilos.这个包重量达到10公斤.
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